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mat 30 I 5 of New York, have invented a new and I usefulComposition of Matter to be Used for Jewelry, Pins, Metallimsprin gs, and other Metallic Articles. My composition consists of the following l ingredients combined in the proportion stated,'-viz':" copperf1'5 parts, silver 5 parts, zinc parts. These metals are first melted and then mixed. The. composition .is then hardened by alternately heating and sud- *denlyfc ooling; On reheating and cooling gradually, the metalbecomes elastic or soft) I X p terconsisting of 15 partsof copper, 5 pa it has been'subjected and to thevrapidity as described.

depending upon 'thedegree of heat to which with Which it is cooled. Variations in the-proportionsof copper and silver used,'copper Within the limits of A from 33%,-% to 56%% and silver Within the limits of from 10% to 33% will show variations in the-quality of the composition. For example, 1 7 parts of copper With-three Specificationof Letters l atent,

- Application filed May 5, 1915. Serial No. 25,91 7.

Patented Aug. 10, 191

parts of silver gives the quality of too; ness to the composition. As the proport of copper is decreased and the silvercor spondingly increased, the composition comes less tough or more brittle, so tl when equal parts of copper and silver 1 employed the compositionis extrem brittle. Therefore, the proportion of -1 parts Will be varied depending upon the to which the composition is to be put. H

zinc may be varied between the limits 28% and 42% of the total composition, W corresponding relative variations in the c per and silver.

I claim:

The herein described composition of m of silver, and 10 parts of zinc, substantia Dated, New .York,'May third, 1915 OTTO I. METZGER Witnesses;

EDWARD A. EATON, RALPH M. SUTPHEN. 

